Grooved impactor and inertial trap for sampling inhalable particulate matter

Patent · Sat Dec 31 23:00:00 EST 1983

OSTI ID:865027

Loo, Billy W ^[1]

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1. Oakland, CA

An inertial trap and grooved impactor for providing a sharp cutoff for particles over 15 microns from entering an inhalable particulate sampler. The impactor head has a tapered surface and is provided with V-shaped grooves. The tapered surface functions for reducing particle blow-off or reentrainment while the grooves prevent particle bounce. Water droplets and any resuspended material over the 15 micron size are collected by the inertial trap and deposited in a reservoir associated with the impactor.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4452068
• OSTI ID: 865027
• Country of Publication: United States
• Language: English

Related Subjects

/73/
15
associated
blow-off
bounce
collected
cutoff
deposited
droplets
entering
functions
grooved
grooved impactor
grooves
head
impactor
inertial
inertial trap
inhalable
inhalable particulate
material
matter
micron
micron size
microns
particle
particles
particulate
particulate matter
prevent
prevent particle
provided
providing
reducing
reducing particle
reentrainment
reservoir
resuspended
sampler
sampling
sharp
sharp cutoff
size
surface
tapered
tapered surface
trap
v-shaped
v-shaped groove
v-shaped grooves
water
water droplets